[flutter_tools] remove mock from analyze_size_test.dart (#74817)

packages/flutter_tools/test/general.shard/base/analyze_size_test.dart

@@ -10,7 +10,6 @@ import 'package:flutter_tools/src/base/analyze_size.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/reporting/reporting.dart';
-import 'package:mockito/mockito.dart';
 
 import '../../src/common.dart';
 
@@ -68,7 +67,7 @@ void main() {
       fileSystem: fileSystem,
       logger: logger,
       appFilenamePattern: RegExp(r'lib.*app\.so'),
-      flutterUsage: MockUsage(),
+      flutterUsage: TestUsage(),
     );
 
     final Archive archive = Archive()
@@ -145,7 +144,7 @@ void main() {
       fileSystem: fileSystem,
       logger: logger,
       appFilenamePattern: RegExp(r'lib.*app\.so'),
-      flutterUsage: MockUsage(),
+      flutterUsage: TestUsage(),
     );
 
     final Archive archive = Archive()
@@ -187,7 +186,7 @@ void main() {
       fileSystem: fileSystem,
       logger: logger,
       appFilenamePattern: RegExp(r'lib.*app\.so'),
-      flutterUsage: MockUsage(),
+      flutterUsage: TestUsage(),
     );
 
     final Directory outputDirectory = fileSystem.directory('example/out/foo.app')
@@ -225,5 +224,3 @@ void main() {
     expect(result['precompiler-trace'], <String, Object>{});
   });
 }
-
-class MockUsage extends Mock implements Usage {}